The commissioner of general services shall make and maintain a complete inventory in permanent form of all state-owned real property, together with necessary surveys, maps, photographs and appraisals, and when such inventory has been completed, a copy of the same shall be filed in the office of the governor, state treasurer, secretary of state, and such other public officials and departments as the governor may designate. The original copy of the inventory shall remain in the office of the commissioner of general services for safekeeping and be preserved by the commissioner as other public records. Partial copies shall be filed with each department of the state, covering property occupied or used by such department.